1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/ci/ciType.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,108 @@
1.4 +/*
1.5 + * Copyright 2000-2001 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// ciType
1.29 +//
1.30 +// This class represents either a class (T_OBJECT), array (T_ARRAY),
1.31 +// or one of the primitive types such as T_INT.
1.32 +class ciType : public ciObject {
1.33 + CI_PACKAGE_ACCESS
1.34 + friend class ciKlass;
1.35 + friend class ciReturnAddress;
1.36 +
1.37 +private:
1.38 + BasicType _basic_type;
1.39 +
1.40 + ciType(BasicType t); // for the primitive types only
1.41 + ciType(KlassHandle k); // for subclasses (reference types)
1.42 + ciType(ciKlass* klass); // for unloaded types
1.43 +
1.44 + const char* type_string() { return "ciType"; }
1.45 +
1.46 + void print_impl(outputStream* st);
1.47 +
1.48 + // Distinguished instances of primitive ciTypes..
1.49 + static ciType* _basic_types[T_CONFLICT+1];
1.50 +
1.51 +public:
1.52 + BasicType basic_type() const { return _basic_type; }
1.53 +
1.54 + // Returns true iff the types are identical, or if both are klasses
1.55 + // and the is_subtype_of relation holds between the klasses.
1.56 + bool is_subtype_of(ciType* type);
1.57 +
1.58 + // Get the instance of java.lang.Class corresponding to this type.
1.59 + // There are mirrors for instance, array, and primitive types (incl. void).
1.60 + virtual ciInstance* java_mirror();
1.61 +
1.62 + // Get the class which "boxes" (or "wraps") values of this type.
1.63 + // Example: short is boxed by java.lang.Short, etc.
1.64 + // Returns self if it is a reference type.
1.65 + // Returns NULL for void, since null is used in such cases.
1.66 + ciKlass* box_klass();
1.67 +
1.68 + // Returns true if this is not a klass or array (i.e., not a reference type).
1.69 + bool is_primitive_type() const { return basic_type() != T_OBJECT && basic_type() != T_ARRAY; }
1.70 + int size() const { return type2size[basic_type()]; }
1.71 + bool is_void() const { return basic_type() == T_VOID; }
1.72 + bool is_one_word() const { return size() == 1; }
1.73 + bool is_two_word() const { return size() == 2; }
1.74 +
1.75 + // What kind of ciObject is this?
1.76 + bool is_type() { return true; }
1.77 + bool is_classless() const { return is_primitive_type(); }
1.78 +
1.79 + virtual void print_name_on(outputStream* st);
1.80 + void print_name() {
1.81 + print_name_on(tty);
1.82 + }
1.83 +
1.84 + static ciType* make(BasicType t);
1.85 +};
1.86 +
1.87 +
1.88 +// ciReturnAddress
1.89 +//
1.90 +// This class represents the type of a specific return address in the
1.91 +// bytecodes.
1.92 +class ciReturnAddress : public ciType {
1.93 + CI_PACKAGE_ACCESS
1.94 +
1.95 +private:
1.96 + // The bci of this return address.
1.97 + int _bci;
1.98 +
1.99 + ciReturnAddress(int bci);
1.100 +
1.101 + const char* type_string() { return "ciReturnAddress"; }
1.102 +
1.103 + void print_impl(outputStream* st);
1.104 +
1.105 +public:
1.106 + bool is_return_address() { return true; }
1.107 +
1.108 + int bci() { return _bci; }
1.109 +
1.110 + static ciReturnAddress* make(int bci);
1.111 +};
